// 推荐记录表 (RecommendationLog.java)
package mock;
import lombok.Builder;
import lombok.Data;
import java.time.LocalDateTime;
@Data @Builder
public class RecommendationLog {
    private Integer logId;
    private Integer userId;
    private Integer recommendedId;
    private LocalDateTime recommendTime;
    private Integer exposureCount;
    private Integer clickCount;
    private Double conversionRate;
}